board-dm355-leopard.c

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/*
 * DM355 leopard board support
 *
 * Based on board-dm355-evm.c
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2. This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <linux/spi/spi.h>
#include <linux/spi/eeprom.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <linux/platform_data/i2c-davinci.h>
#include <mach/serial.h>
#include <linux/platform_data/mtd-davinci.h>
#include <linux/platform_data/mmc-davinci.h>
#include <linux/platform_data/usb-davinci.h>

#include "davinci.h"

/* NOTE:  this is geared for the standard config, with a socketed
 * 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors.  If you
 * swap chips, maybe with a different block size, partitioning may
 * need to be changed.
 */
#define NAND_BLOCK_SIZE     SZ_128K

static struct mtd_partition davinci_nand_partitions[] = {
    {
        /* UBL (a few copies) plus U-Boot */
        .name       = "bootloader",
        .offset     = 0,
        .size       = 15 * NAND_BLOCK_SIZE,
        .mask_flags = MTD_WRITEABLE, /* force read-only */
    }, {
        /* U-Boot environment */
        .name       = "params",
        .offset     = MTDPART_OFS_APPEND,
        .size       = 1 * NAND_BLOCK_SIZE,
        .mask_flags = 0,
    }, {
        .name       = "kernel",
        .offset     = MTDPART_OFS_APPEND,
        .size       = SZ_4M,
        .mask_flags = 0,
    }, {
        .name       = "filesystem1",
        .offset     = MTDPART_OFS_APPEND,
        .size       = SZ_512M,
        .mask_flags = 0,
    }, {
        .name       = "filesystem2",
        .offset     = MTDPART_OFS_APPEND,
        .size       = MTDPART_SIZ_FULL,
        .mask_flags = 0,
    }
    /* two blocks with bad block table (and mirror) at the end */
};

static struct davinci_nand_pdata davinci_nand_data = {
    .mask_chipsel       = BIT(14),
    .parts          = davinci_nand_partitions,
    .nr_parts       = ARRAY_SIZE(davinci_nand_partitions),
    .ecc_mode       = NAND_ECC_HW_SYNDROME,
    .bbt_options        = NAND_BBT_USE_FLASH,
};

static struct resource davinci_nand_resources[] = {
    {
        .start      = DM355_ASYNC_EMIF_DATA_CE0_BASE,
        .end        = DM355_ASYNC_EMIF_DATA_CE0_BASE + SZ_32M - 1,
        .flags      = IORESOURCE_MEM,
    }, {
        .start      = DM355_ASYNC_EMIF_CONTROL_BASE,
        .end        = DM355_ASYNC_EMIF_CONTROL_BASE + SZ_4K - 1,
        .flags      = IORESOURCE_MEM,
    },
};

static struct platform_device davinci_nand_device = {
    .name           = "davinci_nand",
    .id         = 0,

    .num_resources      = ARRAY_SIZE(davinci_nand_resources),
    .resource       = davinci_nand_resources,

    .dev            = {
        .platform_data  = &davinci_nand_data,
    },
};

static struct davinci_i2c_platform_data i2c_pdata = {
    .bus_freq   = 400   /* kHz */,
    .bus_delay  = 0 /* usec */,
};

static int leopard_mmc_gpio = -EINVAL;

static void dm355leopard_mmcsd_gpios(unsigned gpio)
{
    gpio_request(gpio + 0, "mmc0_ro");
    gpio_request(gpio + 1, "mmc0_cd");
    gpio_request(gpio + 2, "mmc1_ro");
    gpio_request(gpio + 3, "mmc1_cd");

    /* we "know" these are input-only so we don't
     * need to call gpio_direction_input()
     */

    leopard_mmc_gpio = gpio;
}

static struct i2c_board_info dm355leopard_i2c_info[] = {
    { I2C_BOARD_INFO("dm355leopard_msp", 0x25),
        .platform_data = dm355leopard_mmcsd_gpios,
        /* plus irq */ },
    /* { I2C_BOARD_INFO("tlv320aic3x", 0x1b), }, */
    /* { I2C_BOARD_INFO("tvp5146", 0x5d), }, */
};

static void __init leopard_init_i2c(void)
{
    davinci_init_i2c(&i2c_pdata);

    gpio_request(5, "dm355leopard_msp");
    gpio_direction_input(5);
    dm355leopard_i2c_info[0].irq = gpio_to_irq(5);

    i2c_register_board_info(1, dm355leopard_i2c_info,
            ARRAY_SIZE(dm355leopard_i2c_info));
}

static struct resource dm355leopard_dm9000_rsrc[] = {
    {
        /* addr */
        .start  = 0x04000000,
        .end    = 0x04000001,
        .flags  = IORESOURCE_MEM,
    }, {
        /* data */
        .start  = 0x04000016,
        .end    = 0x04000017,
        .flags  = IORESOURCE_MEM,
    }, {
        .flags  = IORESOURCE_IRQ
            | IORESOURCE_IRQ_HIGHEDGE /* rising (active high) */,
    },
};

static struct platform_device dm355leopard_dm9000 = {
    .name       = "dm9000",
    .id     = -1,
    .resource   = dm355leopard_dm9000_rsrc,
    .num_resources  = ARRAY_SIZE(dm355leopard_dm9000_rsrc),
};

static struct platform_device *davinci_leopard_devices[] __initdata = {
    &dm355leopard_dm9000,
    &davinci_nand_device,
};

static struct davinci_uart_config uart_config __initdata = {
    .enabled_uarts = (1 << 0),
};

static void __init dm355_leopard_map_io(void)
{
    dm355_init();
}

static int dm355leopard_mmc_get_cd(int module)
{
    if (!gpio_is_valid(leopard_mmc_gpio))
        return -ENXIO;
    /* low == card present */
    return !gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 1);
}

static int dm355leopard_mmc_get_ro(int module)
{
    if (!gpio_is_valid(leopard_mmc_gpio))
        return -ENXIO;
    /* high == card's write protect switch active */
    return gpio_get_value_cansleep(leopard_mmc_gpio + 2 * module + 0);
}

static struct davinci_mmc_config dm355leopard_mmc_config = {
    .get_cd     = dm355leopard_mmc_get_cd,
    .get_ro     = dm355leopard_mmc_get_ro,
    .wires      = 4,
    .max_freq       = 50000000,
    .caps           = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
};

/* Don't connect anything to J10 unless you're only using USB host
 * mode *and* have to do so with some kind of gender-bender.  If
 * you have proper Mini-B or Mini-A cables (or Mini-A adapters)
 * the ID pin won't need any help.
 */
#ifdef CONFIG_USB_MUSB_PERIPHERAL
#define USB_ID_VALUE    0   /* ID pulled high; *should* float */
#else
#define USB_ID_VALUE    1   /* ID pulled low */
#endif

static struct spi_eeprom at25640a = {
    .byte_len   = SZ_64K / 8,
    .name       = "at25640a",
    .page_size  = 32,
    .flags      = EE_ADDR2,
};

static struct spi_board_info dm355_leopard_spi_info[] __initconst = {
    {
        .modalias   = "at25",
        .platform_data  = &at25640a,
        .max_speed_hz   = 10 * 1000 * 1000, /* at 3v3 */
        .bus_num    = 0,
        .chip_select    = 0,
        .mode       = SPI_MODE_0,
    },
};

static __init void dm355_leopard_init(void)
{
    struct clk *aemif;

    gpio_request(9, "dm9000");
    gpio_direction_input(9);
    dm355leopard_dm9000_rsrc[2].start = gpio_to_irq(9);

    aemif = clk_get(&dm355leopard_dm9000.dev, "aemif");
    if (IS_ERR(aemif))
        WARN("%s: unable to get AEMIF clock\n", __func__);
    else
        clk_enable(aemif);

    platform_add_devices(davinci_leopard_devices,
                 ARRAY_SIZE(davinci_leopard_devices));
    leopard_init_i2c();
    davinci_serial_init(&uart_config);

    /* NOTE:  NAND flash timings set by the UBL are slower than
     * needed by MT29F16G08FAA chips ... EMIF.A1CR is 0x40400204
     * but could be 0x0400008c for about 25% faster page reads.
     */

    gpio_request(2, "usb_id_toggle");
    gpio_direction_output(2, USB_ID_VALUE);
    /* irlml6401 switches over 1A in under 8 msec */
    davinci_setup_usb(1000, 8);

    davinci_setup_mmc(0, &dm355leopard_mmc_config);
    davinci_setup_mmc(1, &dm355leopard_mmc_config);

    dm355_init_spi0(BIT(0), dm355_leopard_spi_info,
            ARRAY_SIZE(dm355_leopard_spi_info));
}

MACHINE_START(DM355_LEOPARD, "DaVinci DM355 leopard")
    .atag_offset  = 0x100,
    .map_io       = dm355_leopard_map_io,
    .init_irq     = davinci_irq_init,
    .timer        = &davinci_timer,
    .init_machine = dm355_leopard_init,
    .init_late  = davinci_init_late,
    .dma_zone_size  = SZ_128M,
    .restart    = davinci_restart,
MACHINE_END